A avaliação da erosão hídrica usando a Modelagem de Mínimos Quadrados Parciais: um estudo em uma área legalmente protegida com conflitos ambientais de uso da terra

Abstract

Several approaches to water erosion measurement have been used to help control this phenomenon. In this study a new perspective was presented, through which the modeling of paths by Partial Least Squares (PLS-PM) is used. An intermediate process was to verify the spatial relationship between the variables measured soil loss, land use conflict and brightness index, through cross tabulation. For this, data were extracted from soil samples and alphanumeric cartographic products at 37 sites of the APA of the Uberaba river. The variables chosen were Surface runoff, Environmental use conflict, Soil fertility and Relief factors. The model showed that 70.2% of Erosion is predicted by the independent variables (R² = 0.702), with soil fertility and land use conflict being the variables with the highest influences (β = -0.758 and β = 0.346, respectively). These results show that effective measures of soil conservation and respect for the suitability of the land should be taken seriously, considering the socioeconomic and environmental importance of the APA of the Uberaba River.